使用 Stream 一起验证两个列表

Question

Wish to compare, two (object) lists for

1. Not null
2. Not empty
3. Equal Size
4. Nth Element Field values are same

Possible?

String A = "one,two,three|four,five,six|seven,eight,nine"
String B = "three,six,nine"

List L1 = List.of(A.split("\\|"));
List L2 = List.of(B.split(","));

Give object of List L1, if the third sub value of an element matches with element of the List L2.

Answer 1

Note: This answered the question when it was:

Wish to compare, two (object) lists for
1. Not null
2. Not empty
3. Equal Size
4. Nth Element Field values are same
Possible?

Since then, it was significantly changed...

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Seems like you can go with Objects.equals(list1, list2);

1. When only one of the lists is null, it returns false.

2./3. When the sizes are different, it will return false.

4. When the elements differ, it will also return false.

In any other case, it will return true.

Disclaimer: This works for the standard Lists in the Collections Framework. There might be other implementations which implement equals() differently (and therefore behave differently when applied to Objects.equals() ).